{1}{B}: Sacrifice a permanent: You gain 1 life and target opponent loses 1 life.

{1}{W}{T}: Sacrifice a creature: Give target creature you control hexproof, vigilance, and flying until end of turn.

{1}{U}{T}: Sacrifice a creature: Target permanent becomes a 4/4 artifact creature token until end of turn.

Ummm, Kirei?

3/3